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Drake Stevens
Mathematics
22 February, 23:04
3x+5y=4, 2x-y=-7 solve using substitution
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Anya Schultz
22 February, 23:24
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3x+5y=4 ... (1)
2x-y=-7 ... (2)
by (2) : y = 2x+7
subsct in (1):
3x + 5 (2x+7) = 4
13x = - 31
x = - 31/13
y = 2 (-31/13) + 7 = 29/13
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